Also make sure that the Transfer Queue is started. To start it click on the blue play button in the Transfer Queue window at the bottom.

If you still having problems uploading files with version 3.0 please post the following information:

1. System Information from the menu: Help->About "System Information" dialog2. Log from the Remote Browser AND the Transfer Queue:KB: How To get the logs3. If applicable please provide a screenshot showing the Remote Browser and the Transfer Queue:KB: How to post a screenshot?